Clock for educational purposes

Details Clock for educational purposes Clock for educational purposes

1980-04-02

1981-06-16

Grieb, William H.

Education and demonstration

Telling time or calendar reading

G09B 1912

Patent

active

042735416

ABSTRACT:
A clock for educational purposes comprising a minute hand and an hour hand, both rotatably mounted at the center of the clockface, openings formed in the clockface at locations where the hours and minutes are indicated, and rotating members rotatably supported in the clock and each marked on its face with an hour indicating figure and a minute indicating figure. The surface of each rotating member is partially exposed through respective ones of the openings, and an arm is provided to rotate with the minute hand so as to individually turn the rotating members.

REFERENCES:
patent: 1356929 (1920-10-01), Lewers
patent: 2172450 (1939-09-01), Pitcher
patent: 3002335 (1961-10-01), Kripak
patent: 4015346 (1977-04-01), Ogasawara

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